I honestly think this will make him a less picky eater, but the food we have in the house is what's available for the next week and a half or so.
I somehow got lucky with kids that eat most anything - DSD doesn't have a lot of tolerance for spicy food, but that's about it. The thing that I think will improve from self-isolating/stay at home is DH and DSD's whining about leftovers, since we are trying to make sure that we are using our food supply wisely. DH doesn't complain at all now, and DSD only does very infrequently. I'm trying to go to grocery pick up every 10-12 days now instead of once a week.
I was somewhat picky as a kid - a weird kind of picky, I didn't like most fast food options. The smell of McDonalds french fries still makes me nauseous. Now I would describe myself as particular. I like a lot of foods, but I like them prepared certain ways. I will still eat something that isn't prepared in a way I prefer, but I'll usually just eat enough to look polite.
Tonight we had slow cooker sweet and sour chicken, rice, egg rolls, and mixed veggies. I have enough chicken to serve for leftovers later this week and everyone seemed to really like it.